6ES7350-1AH03-0AE0

Technical specifications

Manufacturer

Siemens

Manufacturer part no.

6ES7350-1AH03-0AE0

Type

Counter module

Application

High-speed counting for S7-300

Used with

SIMATIC S7-300 rack (S7-300 backplane bus)

Auxiliary voltage 1L+, load voltage 2L+ / Rated value (DC)

24 V

Auxiliary voltage 1L+, load voltage 2L+ / permissible range, lower limit (DC)

20.4 V; Dynamic 18.5 V

Auxiliary voltage 1L+, load voltage 2L+ / permissible range, upper limit (DC)

28.8 V; dynamic 30.2 V

Input current / from load voltage 1L+ (without load), max.

40 mA

Input current / from backplane bus 5 V DC, max.

160 mA

5 V encoder supply / 5 V

Yes; 5.2 V ±2 %

5 V encoder supply / Output current, max.

300 mA

24 V encoder supply / 24 V

Yes; 1L+ (-3 V)

24 V encoder supply / Output current, max.

400 mA

Power loss, typ.

4.5 W

Number of digital inputs

3

Digital inputs / Functions

1 for gate start, 1 for gate stop, 1 for setting the counter

Input voltage / for signal "0"

-28.8 ... +5V

Input voltage / for signal "1"

+11 to +28.8V

Input current / for signal "1", typ.

9 mA

Number of digital outputs

2

Digital outputs / Short-circuit protection

Yes; Clocked electronically

Digital outputs / Limitation of inductive shutdown voltage to

2L+ (-39 V)

Output voltage / for signal "0", max.

3 V

Output voltage / for signal "1", min.

2L+ (-1,5 V)

Output current / for signal "1" rated value

0.5 A

Output current / for signal "1" permissible range for 0 to 60 °C, min.

5 mA

Output current / for signal "1" permissible range for 0 to 60 °C, max.

0.6 A

Output delay with resistive load / "0" to "1", max.

300 µs

Connectable encoders / Incremental encoder (symmetrical)

Yes; With 2 pulse trains offset by 90°

Technical documents (1)

• Siemens data sheet 6ES7350-1AH03-0AE0

Key features

• One counter channel, up to 500 kHz
• For 5 V (symmetrical) and 24 V incremental encoders
• 5 V encoder supply up to 300 mA, 24 V up to 400 mA
• 3 digital inputs and 2 digital outputs
• Isochronous mode
• Discontinued by Siemens on 1 October 2025; spare part only

About the Siemens 6ES7350-1AH03-0AE0

The Siemens 6ES7350-1AH03-0AE0 is the FM 350-1 counter module with one channel counting at up to 500 kHz. Siemens's data sheet lists 5 V symmetrical and 24 V incremental encoders, 5 V and 24 V encoder supplies, three digital inputs and two digital outputs, and isochronous mode. Siemens's data sheet marks it as a spare part. Siemens names no direct successor for the order number; its route forward is migration to the S7-1500 with ET 200MP.

What is the 6ES7350-1AH03-0AE0 used for?

It counts fast encoder pulses independently of the CPU cycle, for length measurement, positioning and speed on an S7-300 machine.

Lifecycle and successor

Discontinued: product cancellation (Siemens SiePortal), spare part only.

Before you order

What to photograph or confirm so the right unit is quoted.

Check the order number on the module and the encoder type (5 V or 24 V) wired to it.